package com.JavaBasic;

import com.test.Person;

public class SystemDemo {
	public static void main(String[] args) {
		Person p = new Person("张三",20);
		p = null;
		
		// 回收垃圾
		System.gc();
		
		// 获取当前时间戳
		System.out.println(System.currentTimeMillis());
		
		// 退出jvm虚拟机
		System.exit(0);
	}
}
